How much Wattage do i need for my gaming pc?

[altunkayaeyyup]

Hi everyone. Soon I will be moving to London and I am building a gaming pc. I have a budget of £3000 and will spend it to build my pc.
This is my build:
https://pcpartpicker.com/list/Nzz6wV

How much wattage do i need for this bulding? I will mostly play Dota 2 and all the other famous games really.(Overwatch, BF, CoD etc.)

You guys are experts that's why I came to ask for your help; what would you suggest me to downgrade from that build? Because I feel like I might have to change some of those parts for example the motherboard or is the memory too much?

Oh and one last important question: My storage, I am planning to use only SSDs I'll buy Samsung 512gb pro for my OS and Dota 2. The other however I haven't decided yet. I'm thinking of something like 1tb 850 evo? I am not going to use a lot of space really other than gaming.

Best regards,

 

[GhislainG]

For gaming only, 16 GB is plenty. The GPU draws 250W at peak; therefore a quality 500W PSU meets the requirements. Unless you need more storage, a single 1TB SSD would be fine.

 

[Lucky_SLS]

I would suggest something like this along with the soon to be released 8700k on a z370 mobo like the Asus Strix or asrock fatality or msi gaming pro carbon :

PCPartPicker part list / Price breakdown by merchant

CPU Cooler: CRYORIG - A40 83.0 CFM Liquid CPU Cooler (£89.99 @ Overclockers.co.uk)
Memory: Corsair - Vengeance RGB 16GB (2 x 8GB) DDR4-3000 Memory (£148.80 @ Alza)
Storage: Samsung - PM961 512GB M.2-2280 Solid State Drive (£209.50 @ Novatech)
Storage: Seagate - Barracuda 2TB 3.5" 7200RPM Internal Hard Drive (£55.99 @ Aria PC)
Video Card: Zotac - GeForce GTX 1080 Ti 11GB AMP Edition Video Card (£581.11 @ Amazon UK)
Case: Inwin - 805 RED ATX Mid Tower Case (£124.99 @ Overclockers.co.uk)
Power Supply: SeaSonic - FOCUS Plus Gold 650W 80+ Gold Certified Fully-Modular ATX Power Supply (£87.80 @ Alza)
Operating System: Microsoft - Windows 10 Home OEM 64-bit (£83.70 @ Aria PC)
Monitor: Acer - Predator XB271HUA 27.0" 2560x1440 165Hz Monitor (£499.97 @ Ebuyer)
Keyboard: Razer - Chroma Blackwidow Professional Wired Gaming Keyboard (£129.99 @ Ebuyer)
Mouse: SteelSeries - Rival 700 Wired Optical Mouse (£64.99 @ Box Limited)
Headphones: Kingston - HyperX Cloud II 7.1 Channel Headset (£69.98 @ Ebuyer)
Total: £2146.81
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-08-27 07:39 BST+0100

 

[altunkayaeyyup]

Thanks for the answers. I've changed the 512gb ssd to 1tb.
I wonder what will happen if I buy more wattage than I need? What if I buy a 850 wattage? Or 1000? Would it have any bad effects on my pc?

Also I am going to buy a laptop for my university therefore I will need to install an office microsoft student on my laptop for my essays and stuff. Do I really have to buy 2 of them to use both on my laptop and desktop?
Any help will be appreciated. Thanks

 

[Lucky_SLS]

No issues with going for higher wattage. The issue is quality. Make sure it's a good one.
Windows license usually is single user. So yes you need 2.

 

[altunkayaeyyup]

Thank you @Lucky_SLS.

 

[Lucky_SLS]

Glad to help